MESON Chess Problem Database

Problem Display
PID: 68207 (8/4Q3/B4PP1/6BK/2qk1N2/5P2/1P6/8 w - - 0 1)

Leschemelle, Matthieu

Phenix, 1997

8/4Q3/B4PP1/6BK/2qk1N2/5P2/1P6/8

#2

9 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Se2#
    • 1...Qc5
      • 2.Qe4#
  • Tries
    • 1.Se2+?
      • 1...Kd3
        • 2.Qe4#
      • 1...Qxe2
        • 2.Qd6#
      • 1...Kd5!
    • 1.Qd6+?
      • 1...Qd5
        • 2.Se2#
        • 2.Se6#
      • 1...Ke3!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qe4#
      • 1...Kxd3
        • 2.Qe4#
      • 1...Kd5
        • 2.Qd7#
      • 1...Qxd3
        • 2.Qd6#
      • 1...Qd5
        • 2.Qe3#
      • 1...Qe6
        • 2.Qc5#
      • 1...Qc6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD,P_PINB(D),SBLOCK::S(C)
    • Q(a);P_PINB(D),SBLOCK::QAR1(I)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINQ(a)::QAB1(I)
        • Q(a);P_PINP(B),XS(C)::QAR2(I)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(I);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(I)
    • Vars
      • K(b);P-FLIGHT,P_SPINQ(a),XS(C)::QAB1(I)
      • K(b);P-FLIGHT::QAR2(I)
      • Q(a);N_GUARD,XS(C)::QAR2(I)
      • Q(a);P_PINB(D),SBLOCK::QAB1(I)
      • Q(a);N_GUARD::QAB1(I)
      • Q(a);::QAB1(I)
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